Take the vehicle to an authorized Freightliner
dealer as soon as possible.
Manual Dump Valve
On vehicles equipped with a manual dump valve,
there are two ways to deflate the rear suspension.
With the key in the OFF position, toggle the dump
valve into the "lower" position. If the key is in the ON
position, the parking brake must be set (ON) before
the dump valve is toggled into the "lower" position.
NOTE: If the key is turned to the ON position
and the parking brake is not engaged, the over-
ride will cause reinflation of the air ride system.
Braking Controls
Parking Brake Control Valve
The yellow diamond-shaped knob on the auxiliary
dash panel operates the parking brake control valve
(park brake switch). See
Fig. 4.17. Pull the knob to
apply the parking brakes; push the knob in to release
the parking brakes. Before the parking brakes can be
released, the air pressure in either air brake system
must be at least 65 psi (448 kPa).
See
Chapter 13 under the heading "Dual Air Brake
System" for further information about the parking
brake control valve.
Meritor
™
WABCO® Antilock Braking
System (ABS)
The Meritor WABCO ABS has an amber indicator
light (ABS legend) and, if equipped with automatic
traction control (ATC), an amber wheel spin indicator
light (WHEEL SPIN legend). See
Fig. 4.18.
See the brake system operating instructions in
Chap-
ter 13
for more information about ABS.
1
2
3
f610804
07/27/2006
4
1. Digital Display
2. Mode Identification Label
3. Mode Indicator LED
4. Mode Button
Fig. 4.15, Push-Button Shift Selector
10/26/2001
f610596
Fig. 4.16, Differential Lock Switch
f43036012/10/2003
1
1. Parking Brake Control Valve
Fig. 4.17, Parking Brake Control Valve
ABS
ABS
BRAKE
CHECK
STOP
BRAKE
AIR
WAIT TO
START
CHECK
TRANS
LOW
WATER
WHEEL
SPIN
OPT 1 OPT 8 OPT 9
DEF
QUALITY
RANGE
INHIBIT
12
06/19/2012 f611198
1. Wheel Spin Indicator 2. Tractor ABS Indicator
Fig. 4.18, ABS Indicator Lights
Controls
4.8
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